参数资料
| 型号： | ISL6531CBZ |
| 厂商： | Intersil |
| 文件页数： | 11/17页 |
| 文件大小： | 0K |
| 描述： | IC CONTROLLER INTEL 24SOIC |
| 标准包装： | 30 |
| 应用： | 控制器，Intel Pentium? III，IV |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 2.5V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC |
| 包装： | 管件 |
ISL6531
nodes. Use copper filled polygons on the top and bottom
circuit layers for the phase nodes. Use the remaining printed
circuit layers for small signal wiring. The wiring traces from
the GATE pins to the MOSFET gates should be kept short
and wide enough to easily handle the 1A of drive current.f
+5V V IN
ISL6531
VCC
The critical small signal components include any bypass
capacitors, feedback components, and compensation
components. Position the bypass capacitor, C BP , close to the
VCC pin with a via directly to the ground plane. Place the
PWM converter compensation components close to the FB
and COMP pins. The feedback resistors for both regulators
should also be located as close as possible to the relevant
FB pin with vias tied straight to the ground plane as required.
GND
C BP
D1
C IN
V DDQ Feedback Compensation
This section discusses the feedback compensation of the
BOOT1
C BOOT1
V DDQ regulator. Figure 8 highlights the voltage-mode
control loop for a synchronous-rectified buck converter. The
output voltage (V OUT ) is regulated to the Reference voltage
UGATE1
PHASE1
LGATE1
PHASE1
Q1
Q2
L OUT1
C OUT1
V DDQ
level. The error amplifier (error amp) output (V E/A ) is
compared with the oscillator (OSC) triangular wave to
provide a pulse-width modulated (PWM) wave with an
amplitude of V IN at the PHASE node. The PWM wave is
smoothed by the output filter (L O and C O ).
PGND1
The modulator transfer function is the small-signal transfer
COMP1
FB1
C 2A
R 2A
R4
C 1A
R 1A
C 3A R 3A
function of V OUT /V E/A . This function is dominated by a DC
gain and the output filter (L O and C O ), with a double pole
break frequency at F LC and a zero at F ESR . The DC gain of
the modulator is simply the input voltage (V IN ) divided by the
peak-to-peak oscillator voltage ? V OSC .
SENSE1
+5V V IN
OSC
PWM
COMPARATOR
DRIVER
V IN
L O
V OUT
BOOT2
D2
V DDQ
DV OSC
-
+
DRIVER
PHASE C O
C BOOT2
UGATE2
PHASE2
LGATE2
PGND2
PHASE2
Q3
Q4
L OUT2
C OUT2
V TT
Z FB
V E/A
-
+
ERROR
AMP
Z IN
REFERENCE
ESR
(PARASITIC)
DETAILED COMPENSATION COMPONENTS
SENSE2
KEY
ISLAND ON POWER PLANE LAYER
C 2
C 1
R 2
Z FB
Z IN
C 3
R 3
V OUT
ISLAND ON CIRCUIT PLANE LAYER
VIA CONNECTION TO GROUND PLANE
FIGURE 7. PRINTED CIRCUIT BOARD POWER PLANES
AND ISLANDS
COMP
-
+
ISL6531
FB
R 1
The switching components should be placed close to the
ISL6531 first. Minimize the length of the connections
between the input capacitors, C IN , and the power switches
by placing them nearby. Position both the ceramic and bulk
input capacitors as close to the upper MOSFET drain as
REFERENCE
FIGURE 8. VOLTAGE-MODE BUCK CONVERTER
COMPENSATION DESIGN
Modulator Break Frequency Equations
F LC = ------------------------------------------
F ESR = -------------------------------------------
possible. Position the output inductor and output capacitors
between the upper MOSFET and lower diode and the load.
11
1
2 π x L O x C O
1
2 π x ESR x C O
相关PDF资料 |
PDF描述 |
|---|---|
| GMM06DTAN-S273 | CONN EDGECARD 12POS R/A .156 SLD |
| X5323S8I-2.7T1 | IC SUPERVISOR CPU 32K EE 8-SOIC |
| 4554-100K | INDUCTOR RF 10UH 10% RADIAL |
| 4554-3R3M | INDUCTOR RF 3.3UH 20% RADIAL |
| GSM06DTAD-S273 | CONN EDGECARD 12POS R/A .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6531CBZ-T | 功能描述:IC CONTROLLER INTEL 24SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6531CR | 功能描述:IC CONTROLLER INTEL 32QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6531CR-T | 功能描述:IC CONTROLLER INTEL 32QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6531CRZ | 功能描述:IC CONTROLLER INTEL 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6531CRZ-T | 功能描述:IC CONTROLLER INTEL 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。